Elements, Compounds And Mixtures

Question 1

What’s an element and give examples

Answer 1

A substance that consists of only one type of atom and cannot be broken down into anything simpler by chemical means

Hydrogen (H),
Helium (He),
Carbon (C),
Oxygen (O),
Sodium (Na),

Question 2

Atoms of an element

Answer 2

An atom is the simplest partial of an element that can exist on its own in a stable environment

Question 3

Molecules of an element

Answer 3

A molecule is a particle that has two or more atoms chemically joined together

Question 4

What is a period

Answer 4

A horizontal row in the periodic table

Question 5

What is a group

Answer 5

A vertical column in the periodic table

Question 6

Properties of metals

Answer 6

Good Conducts electricity
Shiny
High density
Good conductors of heat
Malleable
Hard

Question 7

Properties of non metals

Answer 7

Bad conductors of electricity
Bad conductors of heat
Low density
dull
Brittle
Non malleable

Question 8

What is the definition of malleable

Answer 8

Can be hammered into shape

Question 9

What is the definition of ductile

Answer 9

Can be drawn into wires

Question 10

What is the definition of compound

Answer 10

A substances formed when two or more different elements are chemically combined

Difficult to separate

Has different properties than the elements it contains

Question 11

Which elements make up iron sulfide

Answer 11

Iron and sulfur

Question 12

How do you make iron sulfide

Answer 12

Heat a mixture of iron and sulfur

Question 13

What do you observe in the making of iron sulfide

Answer 13

The mixture glows and sulfur burns

Question 14

What does iron Sulfide look like

Answer 14

A black solid

Question 15

What is the word equation of iron Sulfide

Answer 15

Iron+ sulfur =iron Sulfide

Question 16

What is the definition of mixture

Answer 16

Two or more substances Mixed together which are usually easy to separate

Question 17

Iron with acid observation

Answer 17

Bubbles of gas- hydrogen

Question 18

Sulfur with acid observation

Answer 18

No reaction- sulfur floats

Question 19

Iron sulfur mixture with acid observation

Answer 19

Bubbles of gas from iron- sulfur floats

Question 20

Iron Sulfide with acid observation

Answer 20

Smells of rotten eggs

Question 21

What are the two liquids on the periodic table

Answer 21

Hg and Br

Question 22

What are all the gases on the periodic table (there are 13)

Answer 22

He
N
O
F
Ne
Cl
Ar
Se
Kr
Te
I
Xe
At
Rn

Question 23

Describe how to separate an iron and sulphate mixture

Answer 23

Take a magnet and pass it through the mixture, in which case the iron filings will stick to the magnet, while the sulfur does not.

Question 24

What’s a molecule

Answer 24

a molecule is two or more atoms chemically bonded together